Company Recalls Milestones and Looks Forward to Future Innovations

Berwyn, PA -
Wednesday, June 17, 2015

Trinseo (NYSE: TSE), the global materials company and manufacturer of plastics, latex and rubber, announced today that June 17 marks the company's 5th anniversary since its carve out from The Dow Chemical Company and purchase by Bain Capital Partners in 2010.

Today, Trinseo's products continue to be an integral part of the world's automotive market, consumer electronics business, medical applications, and much more. Since its formation, the Company continues to grow, now serving 27 countries, engaging 2,100 employees, and operating 19 manufacturing locations worldwide.

Over the last five years, Trinseo has celebrated many accomplishments:

October 2012 Opened a new SSBR Production Line in Schkopau, Germany to increase the Company's presence in the high performance tire industry

February 2014 Doubled its SSBR Rubber production train capacity to better serve customers

February 2014 Announced expansion of latex capacity at Zhangjiagang, China production facility

April 2014 Announced plans to convert its Ni-BR Rubber production line to Neodymium-BR to meet growing demands for green and ultra-high performance tires

June 2014 Launched and closed its Initial Public Offering of 10,000,000 ordinary shares under the New York Stock Exchange symbol TSE

June 2014 Rang the iconic opening bell at the New York Stock Exchange

October 2014 Announced the re-alignment of business divisions to Performance Materials and Basic Plastics and Feedstocks

February 2015 Completed name change from Styron to Trinseo to represent the increased breadth of the Company

April 2015 Refinanced debt to a more efficient and diverse capital structure that includes debt in both Euros and U.S. Dollars

May 2015 Launched the innovative family of ENLITETM Structural Polymers to focus on strength and lightweight properties for the automotive industry

"When I think back to where we started in June 2010, we had existing businesses and strong customer relationships, but we had a lot of work to do in order to align our businesses and build an independent company with
its own identity and culture," said Chris Pappas, president and CEO, Trinseo. "I believe this transformation is the real milestone of Trinseo, thanks to the continuation of the work and the effort of over 2,100 employees to build this great company. It's been an exciting past five years, and it means a tremendous amount to me to be able to celebrate these accomplishments with all of our employees."

"Trinseo's commitment to technology innovation to support our customers and market trends can be seen in our projects underway, including bringing to market advanced polycarbonate-based compounds for lightweighting in automotive interiors and exteriors; new grades of high performance rubber for better fuel efficiency, rolling resistance, and wet grip; and latex expansion in China for its growing paper market," continued Pappas.

To commemorate the company's 5th anniversary, Trinseo has released a celebratory logo to be used in conjunction with the standard company logo throughout the year.

"As we celebrate these past five years, we've also taken the time to look ahead to the future. In fact, our five year anniversary also marks our one year anniversary as a public company. Our continued focus on innovation across our markets will drive value for our shareholders over time, and we're looking forward to what’s ahead," added Pappas.

About Trinseo

Trinseo is a leading global materials company and manufacturer of plastics, latex and rubber, dedicated to collaborating with customers to deliver innovative and sustainable solutions. Trinseo’s technology is used by customers in industries such as home appliances, automotive, building & construction, carpet, consumer electronics, consumer goods, electrical & lighting, medical, packaging, paper & paperboard, rubber goods and tires. Trinseo had approximately $5.1 billion in revenue in 2014, with 19 manufacturing sites around the world, and approximately 2,100 employees. More information can be found on Trinseo’s website. Formerly known as Styron, Trinseo completed its renaming process in the first quarter of 2015.

Note on Forward-Looking Statements

This press release may contain “forward-looking statements” within the meaning of the safe harbor provisions of the United States Private Securities Litigation Reform Act of 1995. Words such as “expect,” “estimate,” “project,” “budget,” “forecast,” “anticipate,” “intend,” “plan,” “may,” “will,” “could,” “should,” “believes,” “predicts,” “potential,” “continue,” and similar expressions are intended to identify such forward-looking statements. Forward-looking statements in this press release may include, without limitation, forecasts of growth, revenues, business activity, acquisitions, financings and other matters that involve known and unknown risks, uncertainties and other factors that may cause results, levels of activity, performance or achievements to differ materially from results expressed or implied by this press release. As a result of the foregoing considerations, you are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this press release. The Company undertakes no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.